In his fascinating 1997 article, Reality is a Shared Hallucination(1), Howard Bloom examines how our perceptions of reality are formed, not by tangible facts, but by what other people believe to be true. Read the full article from the German publication Telepolis(2).

1. http://www.heise.de/tp/r4/artikel/2/2227/1.html
2. http://www.heise.de/tp/r4/artikel/2/2227/1.html